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CVE-2026-98222— KEYS: encrypted: fix integer overflow of datablob_len

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已修复： KEYS: encrypted：修复 datablob_len 的整数溢出问题 函数将 存储为 类型。该值由多个字符串长度和负载长度计算得出。如果计算结果超过 ，赋值操作会导致分配大小被截断。KASAN（内核地址 sanitizers）报告在 将主密钥描述复制到过小缓冲区时，发生了 32760 字节的 slab 越界写操作。 存储在 中的总负载长度同样为 类型。此处使用 来拒绝无法放入任一目标类型的值，并改用 进行柔性数组分配。

AI Predicted 5.9 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 7e70cb4978507cf31d76b90e4cfb4c28cad87f0c< 1e720f63dbafc093a8f5d519f05b67724993edd4 affected
7e70cb4978507cf31d76b90e4cfb4c28cad87f0c< a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0 affected
7e70cb4978507cf31d76b90e4cfb4c28cad87f0c< cca38f2102a4cd35eda8d48950df4817b4b24757 affected
7e70cb4978507cf31d76b90e4cfb4c28cad87f0c< 8697c431e297eb0d0ab13dda6bc172b48a34f05c affected
2.6.38 affected
< 2.6.38 unaffected
6.12.112≤ 6.12.* unaffected
6.18.54≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-98222

Vulnerability Information
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Vulnerability Title
KEYS: encrypted: fix integer overflow of datablob_len
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KEYS: encrypted: fix integer overflow of datablob_len encrypted_key_alloc() stores datablob_len in a u16. It is computed from multiple string and payload lengths. If the result exceeds U16_MAX, the assignment truncates the allocation size. KASAN reports a 32760-byte slab-out-of-bounds write when __ekey_init() copies the master key description into the undersized buffer. The total payload length stored in key->datalen is also a u16. Use check_add_overflow() to reject values that do not fit either destination, and use kzalloc_flex() for the flexible-array allocation.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 7e70cb4978507cf31d76b90e4cfb4c28cad87f0c ~ 1e720f63dbafc093a8f5d519f05b67724993edd4 -
Linux Linux 2.6.38 -

II. Public POCs for CVE-2026-98222

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III. Intelligence Information for CVE-2026-98222

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Patches & Fixes for CVE-2026-98222 (4)

Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total

CVE-2026-98323 9.8 CRITICAL RDMA/siw: Bound fragmented header copies by the remaining length
CVE-2026-98365 9.8 CRITICAL RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
CVE-2026-98282 8.8 HIGH powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba
CVE-2026-98283 8.8 HIGH KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid()
CVE-2026-98339 8.8 HIGH wifi: cfg80211: don't filter by BSS type when removing stale entries
CVE-2026-98171 8.8 HIGH smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
CVE-2026-98261 8.1 HIGH cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
CVE-2026-98357 8.1 HIGH IB/isert: wait for deferred control PDU completions before releasing the connection
CVE-2026-98239 8.1 HIGH net: lan743x: fix RX checksum use-after-free
CVE-2026-98341 7.8 HIGH wifi: cfg80211: don't free driver-owned scan requests
CVE-2026-98324 7.8 HIGH dmaengine: pxa: fix double counting of the hw descriptors
CVE-2026-98228 7.8 HIGH mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ
CVE-2026-98229 7.8 HIGH xfrm: save input state data before secpath resets
CVE-2026-98320 7.8 HIGH netfilter: flowtable: hold reference on ct until flow is released
CVE-2026-98318 7.8 HIGH smb: client: validate absolute native symlink targets before NT fixups
CVE-2026-98315 7.8 HIGH ntfs: protect runlist updates with the runlist lock
CVE-2026-98260 7.8 HIGH exec: Cleanup POSIX timers right after de_thread()
CVE-2026-98256 7.8 HIGH signal: Prevent exec() race
CVE-2026-98258 7.8 HIGH posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list
CVE-2026-98254 7.8 HIGH swiotlb: use the adjusted address for the highmem page lookup

Showing top 20 of 208 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98222

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